Lily isn't very good at sport, but she CAN / HAS TO / COULDN'T play the guitar well.
can
My cousin CAN / COULD / HAS TO surf when he was only seven years old.
could
Rebecca ... wear a helment when she goes horse-riding.
has to
You... wear goggles when you go skiing, but it's a good idea.
don't have to
Sometimes they ... finish tennis matches early because of rain.
have to
Ella ... do gymnastics at school, but she chooses to do it.
doesn't have to
Mathew and Clara ...cycle to school because their mum doesn't have a car.
have to
